Notes on configuration and operation
6.10 SNMP agent
CP 343-1 Lean
44 Manual, 10/2012, C79000−G8976−C198−07
● Write access is permitted only for the following MIB objects of the system group:
– sysContact
– sysLocation
– sysName
A set sysName is sent as the host name using DHCP option 12 to the DHCP server to
register with a DNS server.
For all other MIB objects / MIB object groups, only read access is possible for security
reasons.
● Traps are not supported by the CP.
"Interfaces" MIB group
This group returns status information about the CP interfaces. The MIB objects of the ifTable
provide the status information of the interfaces. The "ifIndex" object identifier is assigned to
the CP interfaces as follows:
Table 6- 1 Assignment of ifIndex
ifIndex Type of interface
1-2 Port 1-2
3 Internal CP interface
Access permissions using community name
The CP uses the following community names to control the access rights in the SNMP
agent:
Table 6- 2 Access rights in the SNMP agent
Type of access Community name
*)
Read access public
Read and write access private
*) Note the use of lowercase letters!
MIB files for your SNMP tools
If you use an SNMP tool, you will find the MIB files relevant to the CP in the STEP 7
installation in the following folder:
<Drive>\<Installation folder>\Siemens\Step7\S7DATA\snmp\mib
For the Automation System MIB, for example, these are the following files:
● automationPS.mib
● automationSmi.mib
● automationSystem.mib
● automationTC.mib
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